We use Huai'an crane rental As an example, we learned that the paper filter air filter of small cranes is generally maintained after the diesel engine works for 500~1500h, and can also be lengthened or shortened according to the environmental conditions. During maintenance, take out the filter element, gently tap its end face, or blow out compressed air from the inner cavity of the filter element, or gently brush the surface with a brush. However, do not clean with oil or water.

Inertia oil bath air filter can be cleaned every 100 hours. When working in a clean environment, it can be cleaned every 150~200 hours. When cleaning, take out the steel wire area, clean it with gasoline, and dry it with compressed air. At the same time, clean the oil pool in the filter, and then add an appropriate amount of new engine oil. small-scale crane The maintenance of electrical equipment is based on small crane The load in operation and the role of controller and general contactor to achieve the purpose of maintaining electrical equipment.

I Huai'an equipment displacement Small crane It generally includes the following aspects:

1. Limit maintenance: including winch limiter (upper limit direction limiter and lower limit direction limiter) crane And trolley travel switch. Regularly check whether the fixing bolts and nuts are loose, and ensure that the power supply is cut off at the specified position. All metal contacts in the switch must be kept intact, and all moving parts should be lubricated regularly to avoid wear.

2. Overload limiter and moment limiter: when the weight of the load exceeds the rated lifting capacity or the load acts on the boom within a certain range, making the lifting torque exceed the rated lifting torque, the overload limiter or moment limiter can actively block the lifting power supply and send an alarm signal. Frequently check whether the wiring is firm and free from looseness, and each contact is in good contact and sensitive.

3. Electrical interlocking maintenance device: crane The electrical interlock switch of is set at crane On the cab door, upper hatch and railing door of two head beams. When the door is opened, the switch contact is also connected, and the small crane is electrically stopped, which can avoid personal injury accidents when people get on and off the vehicle. Frequently check whether the switch contacts are intact and sensitive.

4. Emergency power-off maintenance (emergency switch) crane The emergency power-off maintenance of is completed by using the emergency switch installed in the convenient operating position of the cab. Its function is to lock the interlocking maintenance circuit in case of accident or emergency. Therefore, it is not allowed to use emergency switch to replace any normal operation and power off switch.

5. Over current maintenance, zero voltage maintenance and zero position maintenance. Overcurrent maintenance includes short circuit and overload maintenance. Maintenance methods such as fuse and electromagnetic overcurrent relay action are mainly selected.